Wire-line-guide attachment for oil-well derricks



Sept. 14 1926.

E. W. GOESER WIRE LINE GUIDE ATTACHMENT FOR OIL WELL DERRICKS Filed Mar cn 29,]1924 2 Sheets-Sheet 1 Sept. 14 1926. v 1,599,709 E. w. GO ESER WIRE LINE-GUIDE ATTACHMENT FOR OIL WELL DERRICKS Filed March 29, 1924 2 Sheets-Sheet 2 f v14's, fa-W5 ''ofs /c 5 @JW W' M A TTo A/E'Ys,

Patented Sept. 14, 1926.

Enwnr w. coasts, "or nos messes, catiroiartia, AssIeitoR, in tests ASSIGN ti e some. s ess a sw NIA, A CORPORATION OF CALIFORNIA.

COMPANY, or Los ANGEL'ES, cALiron- WIRE-LINE-G'UIDE ATTACHMENT ron OIL-WELL renames.

Application filed March as, 1924. Serial No. 702,893.

My invention relates to the "equipment used in oil well drilling and production, and more particularly to the hoisting equipment ordinarily installed in an oil well derrick. This equipment consists of suitable sheaves installed at the top of the derrick, and collectively called, with their associated parts, a crown block, together with suitable hoisting apparatus near the derrick floor and a suitable pulley block which has a plurality of sheaves around which, and around some of the sheaves of the crown block, a wire hoisting rope is threaded.

The service required of this hoisting equipment is very severe and any failure thereof is very expensive, since wells are often ruined by dropping the pipe or tools therein. Since the investment in any such well, neglecting prospective profits, may exceed one hundred thousand dollars, it is obvious that any failure of the hoisting equipment, which may easily ruin the well, is a very serious matter.

It is an object of my invention to prolong the life and increase the reliability 'of such equipment by reducing the wear 'on the rope and sheaves and by eliminating side strains on the sheaves of the crown block.

Further objects and advantages will be made evident herein.

Referring to the drawings which are for illustrative purposes only Fig. 1 is a side elevation of my invention ap lied to an oil well derrick Fig. '2 is a similar iew on an enlarged scale, the crown block being omitted.

Fig. 3 is a front elevation.

Fig. 4 is a "section on a plane represented by the line of Fig. 2.

In the form of the invention illustrated, I provide a crown block consisting of sheaves 11 and 12 mounted on suitable shafts which are supported on an I-b'eain structure 13, this structure being "supported on the cross beams 14 of the derrick. A wire line 20 extends upwardly from the derrick floor and engages one of the sheaves 1-2; The wire line 20, due to the position of the apparatus to which it is attached at the lower end, does not lead to the sheave 12 in the plane of the rope groove of that sheave, but extends upwardly at an angle thereto. It is possible, if this angle is not too great, to operate with the wire line pass 1ng dlrectly to the sheave 12, but in such an event there is considerable wear on the side of the rope groove and there is a side straln on the sheave. As a result the sheave and the rope tend to wear. There is some tendency for the rope to jump off the sheave and the crown block and its supporting structure" is subject to a side strain. To prevent this side strain and for the purpose of leading the rope 20 to the she-ave 12 on the central plane of the sheave I provide roller means '80, this roller in'eans consisting of a cylindrical roller mounted to' base 33. Bolts 38 pass through the bracket 35, the heads 39 of the bolts 38 slidingin the T slot 34; These bolts are provided with nuts 40, by means of which the br'a'elret 35 may be clamped down towards the base 33,

rigidly securing the shaft 31 thereon. It -w1ll be seen that the brackets 3-5 can be readily moved along the upper surfaces 37 of the bracket base 33 so that the position of the bearing means 30 can be readily 'ad .juste d. The bracket base 33 is preferably so placed that the bearing means 30 turns about a horizontal "axis which is parallel to the central plane of the sheave 12.; Due to the construction shown, the shaft 81 can be adjusted towards or away from the central plane of the sheave. In practice, the derrick shifts a little in position from time to time "so that the sheaves must frequently be adjusted so that they will be in proper position relative to the well and the rotary draw works. The cylindrical roller must, therefore; be adjustable so that it may be disposed in proper relation to the sheaves in the crown block. v

In practice it is so adjusted that the rcpt 20, upon leaving the bearing means 30, is in the central plane of the sheaves 12 so that there is no wear on the rope or the sheave due to any irregularity therebetween and so that there is no side strain on the draw works due to a side pull. The roller means 30 is preferably made in the form of a cylindrical roller so that the rope 20 can adjust itself along the face of this roller to suit conditions, any movement alongithis face being in the central plane of the sheave 12 and not exerting any side strain thereon.

I claim as my invention 1. In an oil well derrick, the combination of: a supporting structure at the top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; roller means turning about a roller axis situated in a horizontal roller axis plane parallel to, but below, a. horizontal plane passing through the sheave axis; a shaft upon which said roller means is supported; a bracket base supported on said structure; brackets slidable on said bracket base and adapted to clamp said shaft to said bracket base; and means for securing said bracket to said bracket base.

2. In an oil well derrick, the combination of: a supporting structure at the top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; roller means turning about a roller axis situated in a horizontal roller axis plane parallel to, but below, a horizontal plane passing through the sheave axis, said horizontal roller axis being parallel to a plane passing through the center of the rope groove of said sheave; a shaft upon which said roller means is supported; a bracket base supported on said structure; brackets slidable on said bracket base and adapted to clamp said shaft to said bracket base; and means for securing said bracket to said bracket base.

3. In an oil" well derrick, the combination of: a supporting structure at the top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; a bracket secured to said structure below said sheave; a shaft slidably mounted on said bracket; means for securing said shaft to said bracket; and a cylindrical roller mounted on said shaft so disposed as to guide said rope to said sheave in a plane passing through the center of the rope groove in said sheave.

4. In an oil wellderrick, the combination of: a supporting structure at the top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; a bracket secured to said structure below said sheave; a shaft slidably mounted on said bracket; means for securing said shaft to said bracket; and a cylindrical roller mounted on said shaft and turning about a roller axis situated in a horizontal roller axis plane parallel to, but below, a horizontal plane passing through the sheave axis.

5. In an oil well derrick, the combination of: a supporting structure at the top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; a bracket secured to said structure below said sheave; a shaft slidably mounted on said bracket; a clamp adapted to associate said shaft with said bracket; means for securing said clamp upon said bracket; and a cylindrical roller mounted on said shaft so disposed as to guide said rope to said sheave in a plane passing through the center of the rope groove in said sheave.

6. In an oil well derrick, the combination of: a supporting structure at the top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; a bracket secured to said structure below said sheave; a shaft slidably mounted on said bracket; a clamp adapted to associate said shaft with said bracket; means'for securing said clamp upon said bracket in a plurality of positions so that the position of said roller may be adjusted; and a cylindrical roller mounted on said shaft so disposed as to guide said rope to said sheave in a plane passing through the center of the rope groove in said sheave 7. In an oil well derrick, the combination of: a supporting structure at the-top of the derrick; a sheave mounted to turn about a horizontal sheave axis; means for supporting said sheave on said structure; a rope passing over said sheave; a cylindrical roller turning about a roller axis situated in a horizontal roller axis plane parallel to, but below, horizontal plane passing through the sheave axis; a shaft upon which said cylindrical roller is supported; a bracket base supported on said structure; brackets slidabio on said bracket base and adapted to clamp said shaft to said bracket base; and means for securing said bracket to said bracket base. i a

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 19th day of March, 1924.

EDWVIN IV. GOESER. 

